Mold-cutter.



No. '704;041. PATBNTED MR. v, 1005. W. H. P000.

MOLD CUTTER.

APPLIOATION HLBD 1100.001900.

mig'ht tend to prevent the true and proper alinement of the mold-spaces that casting may be done in the alined spaces. y

rIhe block A, as herein represented, has a hole to receive the shank Z2 of a support D, so that said support during the operation of cuttinga mold-space may be maintained firmly in position with relation to the shaft or spindle carrying the cutting-tool. The support D has its face (Z3, against which is applied the side of the mold material in which is to be cut the mold-space, exactly at right angles to the longitudinal axis of the shaft or spindle carryingl the tool, such position of the support with relation to the shaft or tool insuring' the formation of the moldspace correctly and the cutting of the groove therein to exactly the propel' depth from the face of the mold material.

The mold material should be so sustained that it will not slide or tip With. relation to the longitudinal axis of the shaft or spindle B during the time that the mold-space is being cut therein, and to insure this I have provided the support D with means to act against the side walls of the mold material, said means, as herein represented, being pins (Z4, and to further prevent any possibility of the mold material tipping' the support is provided with a plurality of prongs (Z5, said pins and prongs engaging the mold material outside of the point where the tool enters the mold material to cut the mold-space.

I prefer that the support and spindle be relatively fixed in the same block; but this is not a necessity of my invention, and the support holding the coal may be otherwise sustained.

The stud Zz at the end of the shaft or spindle will preferably be fixed thereto, and consequently it will turn in the bushing, before described, inserted in the coal and the bushing will prevent any enlargement of the hole which otherwise would occur, and therefore prevent the proper centering of the two moldhalves with relation each to the other. With the bushing in the mold material the latter may he' held in one hand and the spindle Vin the other, and with the stud 3 entering the bushing' the spindle may be rotated to complete, if desired, the mold-space.

To provide a piece of mold material with a mold-space, the side Walls of the material may -be pressed against the studs (Z1, and the face of the material Which is to be cut in the for-l mation of themold-space may be impaled on the prongs d, the face of the material taking a seat on a face at the support D. The tool having been properly adjusted eccentrically with relation to the shaft or spindle for moving' it, the end of the tool will be put in contact with the face of the mold material, and by a rotation of either the shaft or spindle or the mold material an annular groove will be cut in the mold material, andthe depth of this groove may be determined by an adjustable stud e contacting with the block A, said stud being held ina slot e, made in the shaft or spindle, said stud being confined in any desired position by means of a suitable clamping-nut or by the contact of the end :2 of the sha ft or spindle with the face of the coal.

Having described my invention, what I claim, and desire to secure by Letters Patent,

1. A device for forming finger-ring' molds, comprising a shaft or spindle, a support to receive and sustain part of the face, end, and side edges of mold material to restrain the rotation thereof, a tool disposed eccentrically with relation to the longitudinal axis of said shaft or spindle to cut a mold-groove in the mold material, and means to regulate the depth of the mold-groove.

2. A device for forming finger-ring molds, comprising a rotatable shaft or spindle, a tool carried thereby to cut a circular groove in the face of a block of mold material, asupport to engage the face of the mold material and also an edge thereof, and means to stop the cutting action of said tool before the mold-groove has been cut entirely through said material.

3. A device for forming finger-ring' molds, comprising a support for mold material, said support contacting' With the face and edge of a block of mold material, a guide eng'aging said support, a stud extended beyond the end of said shaft or spindle and concentric With the longitudinal axis thereof, a cutting-tool substantially parallel with said stud and adjustably sustained by said shaft, said tool acting to cut a groove in one face of the mold material While the relative positions of said support and spindle are changed in the direction of the longitudinal axis of the spindle, and the spindle is being rotated.

Ll. In a device for forming finger-ring molds, a rotatable shaft or spindle having' an axiallyextended guiding-pin to enter a hole bored in a block of mold material, and having' an opening at right angles to the longitudinal axis of said pin and shaft or spindle, an adjustable cutter, and means to adjust and sustain said cutter at a greater or less distance from the longitudinal axis of said shaft or spindle according to the diameter of the groove to be cut in mold material, said cutter being adjustable With relation to the end of said spindle according' to the depth of the groove to be cut in the mold material.

5. In a device for forming' finger-ring molds, means to sustain and abut against one face and the edge of, and prevent the rotation of, a blocl; of mold material, a rotatable shaft or spindle, a cutter adjustably sustained on and rotatable With said shaft or spindle, said cutter presenting' a cutting-point shaped to correspond With the cross-section of the mold-groove to be eut,

IIO

and means to determine the extent of relative longitudinal movement between the means act ing against the face of said mold material and cutter, to enable the mold-groove to be eut lout partially through said mold material.

6. A device for forming1 linger-ring molds, comprising; a shaft or spindle havingl projecting,I from -ts end centrally a pin of reduced diameter to leave the end of the Spindle tree to Contact with the face of mold material in which said pin enters, said spindle having` a hole thereu through at right angles to its longitudinal axis and to theloi'igitudinal axis of the pin, an ad- 

